I have some ideas, but do wait for more before you make any changes...
Why do bussiness with us?
We are the team of professionals who value creativity and innovation, and can therefore guarantee the best quality of everyday service, as well as offer _relevant support to our _customers. Your company will surely benefit from using the highest quality products and service.
Having a wide network of business associates, we are able to meet our customers� requirements. Our aim is to take care of our clients and provide _professional advice, high quality, affordable prices, as well as a sense of satisfaction after realising a successful business project.
We invite you to work with us!
I �ve underlined the changes and added some punctuation. This last phrase seems completely off to me, but I have no good idea on how to change it. Let �s work together! seems too unprofessional, cooperative sounds like cooperating with the police... You actually need a good slogan here! Perhaps someone else has a better idea... Best of luck!